public static bool TryParse(string str, out Angle q, Unit <Angle> defaultUnit = null) { return(Unit <Angle> .TryParse(str, out q, defaultUnit)); }
// these should be defined as convenience, but cannot be forced by interface public static Angle Parse(string str, Unit <Angle> defaultUnit = null) { return(Unit <Angle> .Parse(str, defaultUnit)); }